Have you tested the mount commands and run the scripts you expect udev to execute manually from terminal as root?
Slitaz uses busybox ash shell and applets for utilitys such as mount.
They are not fully compatible with the GNU versions and the shells you find on the full size distros.

I am finally making progress!
It does not seem to handle the same rule options as Fedora does... If I add SYMLINK to the rule it will not process, the subsystem is block and not usb.

It runs my scripts but not properly... I make a script that mounts the drive and touches a log file. When udev triggers the rule, the script touches the log file but does not mount the drive. If I manually run the script, the drive is mounted... Curious.